Move distance field generation to the glyph cache.

Distance fields are currently created in GrTextStrike, which is the wrong place. This moves that to the glyph cache where it belongs.

As part of my testing, I found that when we fall back to paths in the GrDistanceFieldTextContext it was not scaling them properly, so that's fixed in here too.

R=robertphillips@google.com, reed@google.com

Author: jvanverth@google.com

Review URL: https://codereview.chromium.org/227593010

git-svn-id: http://skia.googlecode.com/svn/trunk@14193 2bbb7eff-a529-9590-31e7-b0007b416f81
11 files changed